The article explores the 12-3-30 workout trend, a treadmill routine that has gained popularity on social media. Invented by Lauren Giraldo, the workout involves walking on a treadmill at a 12% incline, 3 miles per hour for 30 minutes.

People are drawn to the 12-3-30 workout for its effectiveness in burning calories. It is a challenging workout that targets the glutes, hamstrings, lower back, and calves more than regular walking on a flat surface. Personal trainers agree that the workout is safe and efficient for most fitness levels.

However, there are ways to modify the workout if you are a beginner. Heather Hart, an exercise physiologist, recommends starting with a lower incline, slower speed, or shorter duration. You can gradually increase the intensity as you get stronger.The key to reaping the benefits of this workout is consistency, according to Dr. Jordan Metzl, a sports medicine physician. Ideally, you should perform the workout 3 to 5 times per week to meet the recommended amount of cardio exercise set by the U.S. Department of Health and Human Services.

The 12-3-30 workout is suitable for most people because it is low-impact and can be adjusted for different fitness levels. However, it is important to listen to your body and avoid the workout if you experience any joint pain. Consulting with a doctor is recommended if you have any underlying health conditions. Overall, the 12-3-30 workout is a safe and time-efficient way to get a good cardio workout. If you don’t have access to a treadmill, you can replicate the workout by walking up hills. The article concludes by recommending consulting with a healthcare professional before starting any new exercise routine.